For the most demanding applications—Exact® Index Card Stock is the backbone of every business and classroom. It features a uniform, smooth surface that’s durable enough to take on the toughest jobs, and it holds up to frequent handling and the rigors of postal machines. Size: 8 1/2 x 11; Paper Color(s): White; Paper Weight: 110 lb / 199 gsm; Sheets Per Unit: 250. Acid-Free.